Cover for a fluid filter



FIG. 1 is a top, front, and right side perspective view of a cover for a fluid filter, showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom, rear, and left side view thereof.

The broken lines and unshaded areas adjacent to solid lines depict portions of the cover for a fluid filter that form no part of the claimed design. 

CLAIM The ornamental design for a cover for a fluid filter, as shown and described. 